You basically need to:
- Connect to the server.
- Join the channel.
- Send the message to the channel.
Connecting
You need to open a connection to the IRC server. It's usually done with the fsockopen()
function.
The server expects two commands, NICK
and USER
. Note that the sever expects
as a line-ending (if you don't send it, the server won't accept your commands).
After those two commands are sent, the server will send you a ping.
:irc.servername.com PING :RANDOM-STRING
You must reply it with PONG :RANDOM-STRING
(Same string). The server will periodically send those if you are not active. If you fail to reply, the server will assume you died, and close the connection.
Joining the channel
After connection phase is over (You can tell it because you'll get a 001 command from the server when you do), you join the channel. Send the following command:
JOIN #channel-name
The server will join you to the channel, send you the TOPIC and the NAMES list. Once that's over, you've joined the channel.
Sending the message
If all of the above went correctly, all you need is
PRIVMSG #channel-name :YOUR MESSAGE HERE
Anything after the colon is the message.
Good luck! :)